package com.szq.pattern;

/**
 * @description: 使用类的内部类（线程安全）
 * @author: szq
 * @date: 2021-08-26 10:44:21
 */
public class Singleton_04 {

    private static class SingletonHolder{
        private static Singleton_04 instance = new Singleton_04();
    }

    private Singleton_04(){}

    public static Singleton_04 getInstance(){
        return SingletonHolder.instance;
    }
}
